GNSS Positioning

Status and Features
Nowadays, GNSS receivers have scores – and often hundreds – of channels, enabling them to track GPS, Glonass, Galileo and Compass signals simultaneously. The whole workflow from satellite tracking to calculating the coordinates of the position in a preferred reference system can be conducted automatically in real time. The price of GNSS receivers has dropped steadily since the first GPS receivers came onto the commercial market in 1982. In conjunction with the latest product survey results for GNSS receivers (available at www.geo‑matching.com), the author puts today’s GNSS status and features in perspective. (By Mathias Lemmens, senior editor, GIM International, The... (read more)
2012-12-18 01:53:20

Hemisphere GNSS Releases New GNSS RTK Engine

Hemisphere GNSS has announced the launch of Athena, its next-generation GNSS engine. According to the company, the new core engine has been designed to maximise the ability to excel at the rigorous GNSS requirements of multiple market segment customers in machine control, survey and GIS. Athena is developed for application in virtually every environment where high-accuracy GNSS receivers can be used. Hemisphere’s customers have tested and proven Athena’s performance in long baseline, in open-sky environments, under heavy canopy, and in geographic locations experiencing significant scintillation. The company claims the brand-new GNSS RTK engine has one of the most reliably consistent... (read more)
2015-05-08 11:09:16
2017-02-06 10:08:27

GNSS: Evolution or Revolution

Four Questions on the Status of GNSS
The market for Global Navigation Satellite Systems (GNSS) has never looked so buoyant. Are we in the midst of a revolution or simply witnessing evolution pre-planned and destined to run its course? Two fictional respondents, the revolutionist and the evolutionist, here answer four pertinent questions.<P> GNSS applications are becoming mainstream and available in a growing number of devices. And improvements in the signals via new satellite systems and new technology such as secure user plane (SUPL) for wireless devices will improve reliability and functionality. Everyone would agree that there is a lot going on in GNSS. This is manifested in... (read more)
2008-02-19 12:00:00

GNSS Choke Ring Antenna

With the Leica AR25, Leica Geosystems introduces the next generation of high performance choke ring antenna, covering all present and currently planned GNSS constellations and signals, including L-Band (SBAS, CDGPS and OmniStar). With emerging new satellite systems planned by the European Union (Galileo) and China (Compass/Beidou-2) GNSS networks and reference stations need to be ready to track these new upcoming signals.   Choke ring antennas are recognised as having the best accuracy and tracking performance compared to all other antenna types. They are widely used in infrastructure networks and reference stations today. The new Leica AR25 uses a new 3D... (read more)
2008-03-03 02:32:40

Entry-level GNSS Antenna

Hemisphere GPS has introduced its affordable A325 GNSS Smart Antenna. This new design incorporates professional-level centimetre and sub-metre positioning accuracy powered by Hemisphere GPS’s Eclipse receiver technology and includes L-band and Bluetooth communications support. A325 is a great fit for a variety of applications including agriculture, construction, straddle carriers, robotics, survey and GIS. A325 accuracies are software scalable to be custom-configured for the customer’s specific needs and budget. Users can take advantage of free SBAS sub-metre accuracy or decimetre-level L-band support. For more precise needs such as land surveying, customers can activate the centimetre-level RTK feature with robust GPS and... (read more)
2012-06-28 10:28:24

GNSS Multi-applications Sensor

CHC Navigation’s N71 GNSS Sensor has been designed to bring a cost-effective positioning solution for RTK network operators, precision farming and machine guidance system integrators and marine survey professionals. It is a powerful 220-channel multi-application GNSS sensor delivering positioning features and wireless data links in a rugged aluminum enclosure. The device features low power consumption and offers a wide variety of output messages and data formats for seamless interoperability. The N71 is proposed in various configurations and bundled packages to fit end users’ need with a choice of GNSS geodetic or choke-ring antennas. (read more)
2012-09-21 03:14:27

Integrated GNSS/MEMS INS

OLinkStar has announced an integrated GNSS/MEMS Inertial Navigation System (INS) system, PNS100BGI. The system integrates GPS/ Compass /GLONASS, MEMS IMU, magnetometer, and barometer to deliver a reliable 3D navigation solution. PNS100 tightly couples GNSS positioning and inertial navigation technologies to provide an accurate, continuous, smooth and reliable position, velocity and attitude solution in three dimensions. A 32 channels GPS/Compass/GLONASS receiver, powered by the OlinkStar's OTrack32 chip technology, and a 6-DOF MEMS inertial measurement unit (IMU) including gyros and accelerometers, integrated within a single enclosure, comprises the system's accuracy and availability, even during periods of degraded, multipath, or no satellite signal... (read more)
2010-11-05 12:00:00

GNSS Baseband Chip

OLinkStar offers OTrack32 GPS/BeiDou-2/GLONASS 32-channel baseband chip delivering hig performance using low power. The chip is capable of receiving multi-band GNSS signals simultaneously up to four groups and processing signals concurrently to make multiple constellation navigation possible within a single chip. The OTrack32 is designed in a host-based architecture. The chip supports position update rates of 1, 5, and 10Hz, up to 20Hz. The chip offers friendly interface with various processors including ARM, MIPS, DSP etc. (read more)
2010-11-04 10:34:12

From GPS to GNSS

Septentrio Satellite Navigation
These are exciting times in satellite navigation. Selective availability for GPS switch-off has fuelled use of satellite navigation technology in professional and consumer applications and new signals and systems are reshaping the industry landscape. Septentrio has from its inception embraced new possibilities in satellite navigation. It offers receivers for professional markets, while preparing users for the GNSS of tomorrow. There have been important technological advances over the past decade in chip technology, signal and digital processing, miniaturisation and portability, all supporting the development and use of GPS. And now there are new satellite navigation signals and systems on the way.... (read more)
2007-07-07 12:00:00
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